Dextromethorphan/Guaifenesin/Phenylephrine Side Effects

Brand Names: Certuss-D, Deconex DMX, Zotex, Tusso-DM

Please note - some side effects for Dextromethorphan/Guaifenesin/Phenylephrine may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA at http://www.fda.gov/medwatch/ or 1-800-FDA-1088 (1-800-332-1088).

Side Effects of Dextromethorphan/Guaifenesin/Phenylephrine - for the Consumer

Dextromethorphan/Guaifenesin/Phenylephrine Controlled-Release and Sustained-Release Tablets

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Dextromethorphan/Guaifenesin/Phenylephrine Controlled-Release and Sustained-Release Tablets:

Dizziness; excitability; headache; nausea; nervousness or anxiety; trouble sleeping; weakness.

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor.

Dextromethorphan/Guaifenesin/Phenylephrine Drops

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Dextromethorphan/Guaifenesin/Phenylephrine Drops:

Dizziness; excitability; headache; nausea; nervousness or anxiety; trouble sleeping; weakness.

Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor.

Dextromethorphan/Guaifenesin/Phenylephrine Liquid

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Dextromethorphan/Guaifenesin/Phenylephrine Liquid:

Dizziness; excitability; headache; nausea; nervousness or anxiety; trouble sleeping; weakness.

Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor.

Dextromethorphan/Guaifenesin/Phenylephrine Suspension

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Dextromethorphan/Guaifenesin/Phenylephrine Suspension:

Dizziness; drowsiness; excitability; headache; nausea; nervousness or anxiety; trouble sleeping; weakness.

Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor.

Side Effects by Body System

Cardiovascular

Cardiovascular side effects have included palpitations, tachycardia, and cardiovascular collapse and death.

Gastrointestinal

Gastrointestinal side effects have included nausea and vomiting.

Nervous system

Nervous system side effects have included nervousness, dizziness, sleeplessness, light-headedness, tremor, hallucinations, convulsions, CNS depression, fear, anxiety, headache, and increased irritability or excitement.

Respiratory

Respiratory side effects have included respiratory difficulties.

General

General side effects have included weakness and slight drowsiness.

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